| 1 3 3 3 3 1 3 3 3 3 1 3 3 3 3 1 | = | 10 10 10 10 3 1 3 3 3 3 1 3 3 3 3 1 |
= 10* | 1 1 1 1 3 1 3 3 3 3 1 3 3 3 3 1 |
= 10* | 1 1 1 1 0 -2 0 0 0 0 -2 0 0 0 0 -2 |
= 10* 1 * (-2) * (-2) * (-2)
= -80
四阶行列式的算法 1333 3133 3313 3331
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